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GSM to UMX - Online Audio Converter
Convert GSM to UMX online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
Convert GSM to UMX
Drop GSM audio here or click to select
GSM
UMX (UMX)
About GSM to UMX
Convert GSM to UMX. GSM 06.10 encodes European mobile speech at 13 kbps. UMX wraps tracker music for Unreal-engine game levels. Game containers may bundle several songs; convert each separately..
Why convert GSM to UMX?
- Tiny files with UMX note events (no audio samples).
- Keep quality where supported.
- Private, no upload - runs in your browser.
GSM vs UMX
| Codec | GSM | UMX |
|---|---|---|
| Compression | lossy | sequence |
| Sample behavior | Quality set by bitrate | Note events - no audio samples |
| Typical use | GSM 06.10 encodes European mobile speech at 13 kbps. | UMX wraps tracker music for Unreal-engine game levels. |
When not to convert GSM to UMX
- Skip UMX for recorded sound: it stores note events, not audio, so keep the GSM recording.
- Keep a master copy: repeated exports stack small losses, so archive GSM before batch UMX shares.
Limits
Starting point: GSM - GSM 06.10 encodes European mobile speech at 13 kbps. Carrier framing can offset timing; verify duration. Game containers may bundle several songs; convert each separately. Encode UMX (UMX) from GSM at 256k for music or 128k for speech, starting from the master.
How conversion works
Conversion runs entirely in your browser with FFmpeg WASM. Files never leave your device.
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FAQ
How do I convert GSM to UMX?
Drop your GSM file onto this page, choose quality and codec settings, then click Convert. The result downloads as UMX instantly. All processing runs in your browser.
What codec is used for UMX?
The default codec for UMX is UMX. You can change audio parameters in Advanced mode.
How do you store my files?
We do not store any processed audio. All conversion happens entirely in your browser using FFmpeg WASM.